US20050013710A1 - Turbomolecular pump - Google Patents
Turbomolecular pump Download PDFInfo
- Publication number
- US20050013710A1 US20050013710A1 US10/890,730 US89073004A US2005013710A1 US 20050013710 A1 US20050013710 A1 US 20050013710A1 US 89073004 A US89073004 A US 89073004A US 2005013710 A1 US2005013710 A1 US 2005013710A1
- Authority
- US
- United States
- Prior art keywords
- spacer rings
- turbomolecular pump
- stator discs
- stator
- fixedly connecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/042—Turbomolecular vacuum pumps
Definitions
- the present invention relates to a turbomolecular pump including a plurality of rotor and stator discs arranged alternatively one behind another and producing together a pumping effect, and a plurality of spacer rings for retaining the stator discs at a distance from each other.
- the pump of the type discussed above has pumping active elements formed of rotor and stator discs provided with vanes and arranged alternatively one behind another.
- the rotor and stator discs generally are provided each with a support ring with vanes provided on the ring outer sides.
- the vanes, which are provided on the rotor discs rotate with a high speed and produce, together with the stator vanes, the pumping effect.
- the stator discs are retained at a distance from each other with spacer rings arranged at outer circumferences of the stator discs. The distance between separate stator discs is so selected that the rotor discs can rotate therebetween without contacting the same.
- the stator discs, together with the spacer rings form the stator.
- the stator is centered by an inner wall of the pump housing. Such an assembly with stator discs, spacer rings, and a housing is disclosed in German Patent No. 3,722,164.
- the drawback of the turbomolecular pump of the type disclosed in the German Patent consists in a large number of components which makes the construction of the pump rather complicated. Moreover, the pump has a rather rigid construction which makes the adaptation of the pump to the requirements of a particular usage rather difficult.
- German Publication DE 19951954 which corresponds to U.S. Pat. No. 6,461,123, discloses a turbomolecular pump with a reduced number of components.
- each stator disc, a respective spacer ring, and a section of the pump housing are formed as a one-piece part.
- a drawback of this construction consists in that additional parts are needed for securing and holding together separate stator components. The use of additional parts complicates the assembly of the turbomolecular pump and require additional space.
- an object of the present invention is to provide a turbomolecular pump having a reduced number of components in comparison with known turbomolecular pumps.
- Another object of the present invention is to provide a turbomolecular pump characterized by reduced manufacturing costs and a simplified assembly.
- a further object of the present invention is to provide a turbomolecular pump that can be easily integrated into different systems and, thus, can be easily adapted to particular usage.
- turbomolecular pump of the type described above and including means for fixedly connecting adjacent spacer rings with each other, so that the spacer rings together provide for securing and centering of the stator discs.
- the present invention permits to substantially reduce the number of pump components which reduces manufacturing costs and simplifies the pump assembly.
- the spacer rings are so connected with each other that they take over the function of the pump housing of securing the stator discs in place and centering the same.
- the other functions of the housing are taken over by sections of the recipient which is to be pumped out. This ensures an optimal adaptation of the pump and the recipient. As a result, it becomes possible to arranged the pumping active components in an immediate vicinity of an evacuation region. Because the spacer rings takeover of the functions of the pump housing, the housing as a separate component is eliminated.
- FIG. 1 a cross-sectional view of a turbomolecular pump according to the present invention
- FIG. 2 a cross-sectional view illustrating first connection means for connecting spacer rings
- FIG. 3 a cross-sectional view illustrating second connection means for connecting spacer rings
- FIG. 4 a cross-sectional view illustrating third connection means for connecting spacer rings.
- FIG. 5 a cross-sectional view illustrating fourth connection means for connecting spacer rings.
- a turbomolecular pump according to the present invention which is shown in FIG. 1 , has a housing 1 formed of spacer rings 18 and having a suction inlet opening 2 and a gas outlet opening 4 .
- a rotor shaft 6 is supported in bearings 8 and 9 and is driven by a motor 11 .
- a plurality of rotor discs 14 is secured on the rotor shaft 6 .
- Stator discs 16 are arranged between the rotor discs 14 and are retained at a distance from each other by the spacer rings 18 .
- the rotor discs 14 and the stator discs 16 are provided with a pumping active structure and together produce a pumping effect.
- the spacer rings 18 are assembled and connected with each other in such a way that they form the housing 1 of the pump.
- the spacer rings 18 are also used for securing and centering the stator discs 16 .
- FIG. 2 shows two spacer rings 18 a and 19 a for securing a stator disc 16 .
- the two rings are connected with each other by thread means.
- the two spacer rings 18 and 19 b , with a stator disc 16 are secured with each other with clip means formed of a web 22 and a groove 23 .
- two spacer rings 18 c and 19 c with a stator disc 16 , are connected with each other by a pin 24 .
- two spacer rings 18 d and 19 d are forcelockingly connected with each other at a location 26 , by being pressed to each other.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a turbomolecular pump including a plurality of rotor and stator discs arranged alternatively one behind another and producing together a pumping effect, and a plurality of spacer rings for retaining the stator discs at a distance from each other.
- 2. Description of the Prior Art
- The pump of the type discussed above has pumping active elements formed of rotor and stator discs provided with vanes and arranged alternatively one behind another. The rotor and stator discs generally are provided each with a support ring with vanes provided on the ring outer sides. The vanes, which are provided on the rotor discs rotate with a high speed and produce, together with the stator vanes, the pumping effect. The stator discs are retained at a distance from each other with spacer rings arranged at outer circumferences of the stator discs. The distance between separate stator discs is so selected that the rotor discs can rotate therebetween without contacting the same. The stator discs, together with the spacer rings, form the stator. The stator is centered by an inner wall of the pump housing. Such an assembly with stator discs, spacer rings, and a housing is disclosed in German Patent No. 3,722,164.
- The drawback of the turbomolecular pump of the type disclosed in the German Patent consists in a large number of components which makes the construction of the pump rather complicated. Moreover, the pump has a rather rigid construction which makes the adaptation of the pump to the requirements of a particular usage rather difficult.
- German Publication DE 19951954, which corresponds to U.S. Pat. No. 6,461,123, discloses a turbomolecular pump with a reduced number of components. In this turbomolecular pump, each stator disc, a respective spacer ring, and a section of the pump housing are formed as a one-piece part. However, a drawback of this construction consists in that additional parts are needed for securing and holding together separate stator components. The use of additional parts complicates the assembly of the turbomolecular pump and require additional space.
- Accordingly, an object of the present invention is to provide a turbomolecular pump having a reduced number of components in comparison with known turbomolecular pumps.
- Another object of the present invention is to provide a turbomolecular pump characterized by reduced manufacturing costs and a simplified assembly.
- A further object of the present invention is to provide a turbomolecular pump that can be easily integrated into different systems and, thus, can be easily adapted to particular usage.
- These and other objects of the present invention are achieved by providing a turbomolecular pump of the type described above and including means for fixedly connecting adjacent spacer rings with each other, so that the spacer rings together provide for securing and centering of the stator discs.
- The present invention permits to substantially reduce the number of pump components which reduces manufacturing costs and simplifies the pump assembly. The spacer rings are so connected with each other that they take over the function of the pump housing of securing the stator discs in place and centering the same. The other functions of the housing are taken over by sections of the recipient which is to be pumped out. This ensures an optimal adaptation of the pump and the recipient. As a result, it becomes possible to arranged the pumping active components in an immediate vicinity of an evacuation region. Because the spacer rings takeover of the functions of the pump housing, the housing as a separate component is eliminated.
- The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however both as to its construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of preferred embodiments, when read with reference to the accompanying drawings.
- The drawings show:
-
FIG. 1 a cross-sectional view of a turbomolecular pump according to the present invention; -
FIG. 2 a cross-sectional view illustrating first connection means for connecting spacer rings; -
FIG. 3 a cross-sectional view illustrating second connection means for connecting spacer rings; -
FIG. 4 a cross-sectional view illustrating third connection means for connecting spacer rings; and -
FIG. 5 a cross-sectional view illustrating fourth connection means for connecting spacer rings. - A turbomolecular pump according to the present invention, which is shown in
FIG. 1 , has ahousing 1 formed ofspacer rings 18 and having a suction inlet opening 2 and a gas outlet opening 4. Arotor shaft 6 is supported inbearings motor 11. A plurality ofrotor discs 14 is secured on therotor shaft 6.Stator discs 16 are arranged between therotor discs 14 and are retained at a distance from each other by thespacer rings 18. Therotor discs 14 and thestator discs 16 are provided with a pumping active structure and together produce a pumping effect. - According to the present invention, the
spacer rings 18 are assembled and connected with each other in such a way that they form thehousing 1 of the pump. Thespacer rings 18 are also used for securing and centering thestator discs 16. -
FIG. 2 shows two spacer rings 18 a and 19 a for securing astator disc 16. At alocation 20, the two rings are connected with each other by thread means. - In
FIG. 3 , the two spacer rings 18 and 19 b, with astator disc 16, are secured with each other with clip means formed of aweb 22 and agroove 23. - In
FIG. 4 , twospacer rings stator disc 16, are connected with each other by apin 24. - In
FIG. 5 , two spacer rings 18 d and 19 d, with astator disc 16, are forcelockingly connected with each other at alocation 26, by being pressed to each other. - The sealings between the spacer rings and the spacer rings and other pump components are not shown. For sealing, conventional arrangements such as shown, e.g., in U.S. Pat. No. 6,461,123 incorporated herein for reference thereto, can be used.
- Though the present invention was shown and described with references to the preferred embodiments, such are merely illustrative of the present invention and are not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiments or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10331932.8 | 2003-07-15 | ||
DE10331932.8A DE10331932B4 (en) | 2003-07-15 | 2003-07-15 | Turbo molecular pump |
Publications (2)
Publication Number | Publication Date |
---|---|
US20050013710A1 true US20050013710A1 (en) | 2005-01-20 |
US7278822B2 US7278822B2 (en) | 2007-10-09 |
Family
ID=33461927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/890,730 Expired - Fee Related US7278822B2 (en) | 2003-07-15 | 2004-07-14 | Turbomolecular pump |
Country Status (4)
Country | Link |
---|---|
US (1) | US7278822B2 (en) |
EP (1) | EP1498612B1 (en) |
JP (1) | JP2005036798A (en) |
DE (1) | DE10331932B4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100290915A1 (en) * | 2007-10-11 | 2010-11-18 | Oerlikon Leybold Vacuum Gmbh | Multi-stage pump rotor for a turbomolecular pump |
CN101981321A (en) * | 2008-03-31 | 2011-02-23 | 株式会社岛津制作所 | Turbomolecular pump |
US8613600B2 (en) | 2005-09-22 | 2013-12-24 | Pfeiffer Vacuum Gmbh | Vacuum pump system |
US10337517B2 (en) | 2012-01-27 | 2019-07-02 | Edwards Limited | Gas transfer vacuum pump |
CN114593075A (en) * | 2022-03-15 | 2022-06-07 | 北京中科科仪股份有限公司 | Molecular pump |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006050565A1 (en) * | 2006-10-26 | 2008-04-30 | Pfeiffer Vacuum Gmbh | Stator disk for turbo-molecular pump, has plate at outer ring side, so that plate fulfills spacer ring function, and support ring connected with plate, where plate is turned away from plane, and side is turned outwards in radial direction |
DE102008004297A1 (en) | 2008-01-15 | 2009-07-16 | Oerlikon Leybold Vacuum Gmbh | Turbo molecular pump |
ATE513132T1 (en) * | 2008-07-10 | 2011-07-15 | Grundfos Management As | PUMP UNIT |
DE102008056352A1 (en) * | 2008-11-07 | 2010-05-12 | Oerlikon Leybold Vacuum Gmbh | vacuum pump rotor |
DE102008058149A1 (en) * | 2008-11-20 | 2010-05-27 | Oerlikon Leybold Vacuum Gmbh | Turbo-molecular pump, has rotor element arranged in pump housing, and stator rings surrounding rotor element, where rings exhibit attachment piece extending in longitudinal direction such that adjacent stator ring is arranged within piece |
US8221098B2 (en) * | 2009-03-09 | 2012-07-17 | Honeywell International Inc. | Radial turbomolecular pump with electrostatically levitated rotor |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1288360A (en) * | 1916-11-06 | 1918-12-17 | Ludwig W Zaar | Turbine. |
US2610786A (en) * | 1946-06-25 | 1952-09-16 | Gen Electric | Axial flow compressor |
US3032260A (en) * | 1955-07-12 | 1962-05-01 | Latham Manufactruing Co | Rotary apparatus and method of making the same |
US4832564A (en) * | 1987-07-04 | 1989-05-23 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh | Pumps |
US5052887A (en) * | 1988-02-26 | 1991-10-01 | Novikov Nikolai M | Turbomolecular vacuum pump |
US20010019694A1 (en) * | 2000-03-02 | 2001-09-06 | Armin Blecker | Turbomolecular pump |
US6332752B2 (en) * | 1997-06-27 | 2001-12-25 | Ebara Corporation | Turbo-molecular pump |
US6461123B1 (en) * | 1999-10-28 | 2002-10-08 | Pfeiffer Vacuum Gmbh | Turbomolecular pump |
US6503050B2 (en) * | 2000-12-18 | 2003-01-07 | Applied Materials Inc. | Turbo-molecular pump having enhanced pumping capacity |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57212395A (en) * | 1981-06-24 | 1982-12-27 | Hitachi Ltd | Molecular pump |
DE3402549A1 (en) * | 1984-01-26 | 1985-08-01 | Leybold-Heraeus GmbH, 5000 Köln | Molecular vacuum pump |
JPH02131089U (en) * | 1989-03-31 | 1990-10-30 | ||
JPH04330397A (en) * | 1991-04-30 | 1992-11-18 | Fujitsu Ltd | Turbo molecular pump |
JP3469055B2 (en) * | 1997-08-20 | 2003-11-25 | 三菱重工業株式会社 | Turbo molecular pump |
DE29717764U1 (en) * | 1997-10-06 | 1997-11-20 | Leybold Vakuum GmbH, 50968 Köln | Stator for a turbomolecular vacuum pump |
JP3748323B2 (en) * | 1998-01-09 | 2006-02-22 | 株式会社荏原製作所 | Turbo molecular pump |
-
2003
- 2003-07-15 DE DE10331932.8A patent/DE10331932B4/en not_active Expired - Fee Related
-
2004
- 2004-06-02 JP JP2004164365A patent/JP2005036798A/en active Pending
- 2004-06-17 EP EP04014174.9A patent/EP1498612B1/en not_active Expired - Lifetime
- 2004-07-14 US US10/890,730 patent/US7278822B2/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1288360A (en) * | 1916-11-06 | 1918-12-17 | Ludwig W Zaar | Turbine. |
US2610786A (en) * | 1946-06-25 | 1952-09-16 | Gen Electric | Axial flow compressor |
US3032260A (en) * | 1955-07-12 | 1962-05-01 | Latham Manufactruing Co | Rotary apparatus and method of making the same |
US4832564A (en) * | 1987-07-04 | 1989-05-23 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh | Pumps |
US5052887A (en) * | 1988-02-26 | 1991-10-01 | Novikov Nikolai M | Turbomolecular vacuum pump |
US6332752B2 (en) * | 1997-06-27 | 2001-12-25 | Ebara Corporation | Turbo-molecular pump |
US6461123B1 (en) * | 1999-10-28 | 2002-10-08 | Pfeiffer Vacuum Gmbh | Turbomolecular pump |
US20010019694A1 (en) * | 2000-03-02 | 2001-09-06 | Armin Blecker | Turbomolecular pump |
US6503050B2 (en) * | 2000-12-18 | 2003-01-07 | Applied Materials Inc. | Turbo-molecular pump having enhanced pumping capacity |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8613600B2 (en) | 2005-09-22 | 2013-12-24 | Pfeiffer Vacuum Gmbh | Vacuum pump system |
US20100290915A1 (en) * | 2007-10-11 | 2010-11-18 | Oerlikon Leybold Vacuum Gmbh | Multi-stage pump rotor for a turbomolecular pump |
US8562293B2 (en) | 2007-10-11 | 2013-10-22 | Oerlikon Leybold Vacuum Gmbh | Multi-stage pump rotor for a turbomolecular pump |
TWI453345B (en) * | 2007-10-11 | 2014-09-21 | Oerlikon Leybold Vacuum Gmbh | Multi-stage pump rotor for a turbomolecular pump |
CN101981321A (en) * | 2008-03-31 | 2011-02-23 | 株式会社岛津制作所 | Turbomolecular pump |
US10337517B2 (en) | 2012-01-27 | 2019-07-02 | Edwards Limited | Gas transfer vacuum pump |
CN114593075A (en) * | 2022-03-15 | 2022-06-07 | 北京中科科仪股份有限公司 | Molecular pump |
Also Published As
Publication number | Publication date |
---|---|
EP1498612A2 (en) | 2005-01-19 |
EP1498612A3 (en) | 2011-09-14 |
EP1498612B1 (en) | 2015-07-29 |
JP2005036798A (en) | 2005-02-10 |
US7278822B2 (en) | 2007-10-09 |
DE10331932B4 (en) | 2017-08-24 |
DE10331932A1 (en) | 2005-02-03 |
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Owner name: PFEIFFER VACUUM GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STANZEL, JOERG;REEL/FRAME:015577/0503 Effective date: 20040607 |
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Effective date: 20191009 |